Download - Ppt Ref Dif Inter
![Page 1: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/1.jpg)
![Page 2: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/2.jpg)
Reflection
Reflection is the change in direction of a wavefront at an interface between two different
media so that the wavefront returns into the medium from which it originated. Common
examples include the reflection of light, sound and water waves. The law of reflection says that for specular reflection the angle at which the wave is incident on the surface equals the
angle at which it is reflected
![Page 3: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/3.jpg)
Reflection
![Page 4: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/4.jpg)
The law of reflection
The law of reflection says that for specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected
![Page 5: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/5.jpg)
The angle of incidence is
always ( өi )
equal to the angle of
reflection ( өr )
![Page 6: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/6.jpg)
How much is the angle of reflection if the angle of incident is 30 degrees?
![Page 7: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/7.jpg)
Diffraction
Diffraction refers to various phenomena which occur when a wave encounters an obstacle.
Italian scientist Francesco Maria Grimaldi coined the word "diffraction" and was the first to
record accurate observations of the phenomenon in 1665
![Page 8: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/8.jpg)
Diffraction
In classical physics, the diffraction phenomenon is described as the apparent bending of waves
around small obstacles and the spreading out of waves past small openings.
![Page 9: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/9.jpg)
Diffraction
Similar effects occur when light waves travel through a medium with a varying refractive
index or a sound wave through one with varying acoustic impedance. Diffraction occurs with all waves, including sound waves, water waves,
and electromagnetic waves such as visible light, x-rays and radio waves.
![Page 10: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/10.jpg)
Diffraction
Which slit can bend the waves the greater, small opening or big opening?
![Page 11: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/11.jpg)
![Page 12: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/12.jpg)
![Page 13: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/13.jpg)
![Page 14: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/14.jpg)
interference
In physics, interference is the phenomenon in which two waves superpose each other to form a resultant wave of greater or lower amplitude. Interference usually refers to the interaction of
waves that are correlated or coherent with each other, either because they come from the same source or because they have the same or nearly
the same frequency.
![Page 15: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/15.jpg)
interference
![Page 16: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/16.jpg)
![Page 17: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/17.jpg)
![Page 18: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/18.jpg)
![Page 19: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/19.jpg)
Constructive and destructive interference
![Page 20: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/20.jpg)
interference
![Page 21: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/21.jpg)
Diffraction- apparent bending of waves around small obstacles and the spreading out of waves past small openings
Reflection -the bouncing back of the wave as it hits a barrier
Interference - the phenomenon that occurs when two waves meet while traveling along the same medium
![Page 22: Ppt Ref Dif Inter](https://reader033.vdocuments.us/reader033/viewer/2022061109/54522d26af795911308b4e4f/html5/thumbnails/22.jpg)